7Z1FJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 7Z1FJ, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-10-02.
These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.
SO8OO decoded 16 FT8 messages attributed to 7Z1FJ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (56%), followed by 10 m (25%) and 20 m (19%). In this small sample, the estimated median decoder S/N was -22 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-10-02 20:55 UTC
Observed FT8 message patterns
- Attributed sample
- 16 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -22 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 0.
WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with 7Z1FJ in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to 7Z1FJ
The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.
- Attributed locator
- LL56 · 8 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 3,604 km (approx.)
- Last such locator decoded
- 2026-10-02 20:52 UTC
A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.
Observed FT8 exchanges
S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.
| Time UTC | Band | 7Z1FJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-02 20:56 | 40m | - / - | R2GDV | -16 / - | 2 | Partial capture |
| 10-02 20:53 | 40m | -22 / - | EA4IAH | -11 / - | 3 | ✓ Closing observed |
| 10-02 20:52 | 40m | -24 / - | T77R | - / - | 2 | Partial capture |
| 10-02 20:48 | 40m | - / - | EB3JT | -5 / - | 4 | Partial capture |
| 10-02 20:36 | 40m | - / -18 | F6KFT | +9 / - | 2 | ✓ Closing fragment |
| 10-02 20:32 | 40m | - / - | F6KFT | +8 / - | 2 | Partial capture |
| 10-02 20:18 | 40m | - / - | F4BYA | 0 / - | 4 | Partial capture |
| 10-02 19:10 | 40m | - / -8 | RO3R | -14 / - | 3 | Partial capture |
| 10-02 18:14 | 40m | - / - | YO6GLT | -1 / - | 4 | Partial capture |
| 10-01 19:31 | 40m | - / - | RD3FY | -7 / - | 4 | Partial capture |
| 10-01 18:46 | 40m | - / - | F4BYA | +6 / - | 4 | Partial capture |
| 10-01 18:39 | 40m | - / - | F4BYA | +7 / - | 3 | Partial capture |
| 10-01 18:27 | 40m | - / - | IN3IZQ | -11 / - | 4 | Partial capture |
| 10-01 17:51 | 40m | -16 / -17 | PE1NPS | +2 / -18 | 5 | Partial capture |
| 10-01 17:36 | 40m | - / -13 | LZ3KB | -8 / - | 6 | ✓ Closing fragment |
| 10-01 17:35 | 40m | - / -18 | EA1CP | +4 / - | 2 | Partial capture |
| 09-28 19:38 | 40m | - / - | R7ZY | +3 / - | 2 | Partial capture |
| 09-28 19:05 | 40m | - / - | RD3FY | +2 / - | 2 | Partial capture |
| 09-28 19:01 | 40m | - / - | DB2HA | -1 / - | 8 | Partial capture |
| 09-28 18:31 | 40m | - / -22 | EA3AAY | -10 / - | 3 | Partial capture |
| 09-28 18:30 | 40m | - / -20 | OH6RE | +1 / - | 5 | ✓ Closing fragment |
| 09-28 18:29 | 40m | - / - | DB2HA | +3 / - | 9 | Partial capture |
| 09-26 18:17 | 40m | - / - | EU7FBB | -10 / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 203300 -22 1633 7Z1FJ EA8BIA -16 203630 +8 1102 7Z1FJ F6KFT R-18 (x2) 204815 -5 1632 7Z1FJ EB3JT JN01 204830 -23 1632 CQ 7Z1FJ LL56 204845 -5 1632 7Z1FJ EB3JT JN01 (x3) 205215 -24 1632 T77R 7Z1FJ LL56 (x2) 205330 -11 993 7Z1FJ EA4IAH IN80 (x2) 205545 -22 1632 EA4IAH 7Z1FJ RR73 205600 -17 2375 7Z1FJ R2GDV KO92 (x2)
Decoder S/N history by band
Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee